Add FIPS Self test for AES_ECB decrypt

Add FIPS Self test for AES_ECB decrypt

Fixes #14807

Compliance with IG 9.4 requires that an inverse cipher function be
tested if one is implemented. Just running AES_GCM encrypt/decrypt does not meet this
requirement (Since only ECB, CBC, XTS, KW, KWP support the inverse
function during decryption mode).

Added a mode to the cipher test so that the AES_GCM only does an encrypt
and AES_ECB only does a decrypt. TDES still does both.

Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/14825)